急.

问题描述:

急.
Look,the old people _______ in the park.
A are dancing B is dancing C dance
"the old people"是单数还是复数?

可以试着想一下,老年人在公园里跳舞,肯定不会是一个人在跳,应该是很多人一起跳,所以这里是复数形式,只老年人们.选A